package PhamVanHien;

public class PhepToan {
	public static void main(String[] args) {
		double a;
		double b;
		
		a =  20.5;
		b = 30.5;
		
		System.out.println("a cộng b = "+(a + b));
		System.out.println("a - b= "+(a - b));
		System.out.println("a x b= "+(a*b));
		System.out.println("a : b= "+(a/b));
		
		
	}

}
